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### 15 Cards in this Set

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 Define: Relation A set of ordered pairs Define: Function A set of ordered pairs in which each element of the domain has only ONE element associated with it in the range Define: Onto All elements in the range have a corresponding element in the domain One-to-one Every element in the domain is mapped to a distinct element in the range Define: Dependent Variable A variable whose values always depend on the value(s) of other variable(s) Define: Independent Variable A variable whose value other variables depend upon Define: Vertical Line Test If a vertical line intersects the relation's graph in more than one place, then the relation is NOT a function Define: Domain The set of all possible x-values Define: Range The set of all possible y-values Define: Composition of two functions The function that maps x onto g(f(x)) and whose domain is the set of all values in the domain of f for which f(x) is in the domain of g Define: Natural Numbers The set of numbers that only includes positive numbers Define: Whole Numbers The set of numbers that includes zero and all positive numbers Define: Integers The set of all negative numbers, zero, and positive numbers Define: Rational Numbers The set of numbers that can be written as a ratio (fraction) Define: Real Numbers The set of numbers that can be written as a decimal (all numbers)